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None. Only old fuddy duddies stuck in the 50's still use "light bulbs".
There is people that need them, for example they are often used as a heat source. If you have electric heat you aren't saving a penny in the winter. Common practice for storing a solid fuel burner over the summer is to put an incandescent bulb in it to prevent corrosion. They are used in incubators for chickens. My personal pet peeve is the very slow reaction in outdoor lighting.
I use CFL's in the house becsue they make sense but I have all incandescent outside becsue they make sense.
What is the Question? Somebody write that out in plain algebra please.
Consider the formula below. Furthermore, only consider it when a, b, and c are all positive integers and when x, y, and z are all positive integers bigger than 2:
There are an infinite number of combinations of a, b, c, x, y, and z that you can plug in to make this formula true (we call these combinations "solutions") - and we've come up with thousands upon thousands of solutions for this formula. So far, every single solution we've found has something in common - in every solution a, b, and c have a common prime factor.
That's the conjecture - that in every single solution for this formula a, b, and c have a common prime factor. The problem, with it's attached cash prize, is to prove (or disprove with a counterexample) this conjecture.
Quite a few - first all people involved must be union members, secondly - an Environmental Impact Report must be filed and a study done to ensure that changing the light bulb won't kill some endangered bug, and last there must be middle level bureaucrats who sign off on the project and waste tax payers money until what could have been done by one person in 30 seconds for pennies takes at least 15 people 8 months to do for $20,000.
And liberals claim that they are "rational".
Don't forget the diversity representative to make sure that different light bulbs are considered and that some of the people changing the light bulb are women, minorities, and various sexual orientations, ten people to work on how to provide Obamacare for all the people involved with changing the light bulb, two more people to give out free light bulbs to people who don't work, and two more people to take away your guns.
But, if it's conservatives changing a light bulb, the answer is zero. They don't believe in change - they'd rather stay in the dark. HEY-OH!
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